[Keyboardist Gakushi’s Review] Warm Audio WA-C1 Sound In-Depth Review

Introduction

This time, I am delivering an in-depth review of the analog chorus and vibrato pedal WA-C1 from Warm Audio!
The vibrato pedal recreates the analog modulation style of the legendary Boss CE-1, while also offering unique expanded features, making the WA-C1 really stand out in its category. This review covers its sound quality, usability, and how it compares to competitors, and I will provide helpful insights especially for keyboardists who are considering purchasing one.

Basic Information & Specifications

• Product Name: WA-C1 Chorus Vibrato
• Manufacturer: WARM AUDIO
• Effect Type: Analog BBD Chorus / Vibrato (Stereo Output)
• Price Range: Approx. ¥27,800
• Key Features:
  • Independent Depth and Rate knobs for precise modulation control
  • Built-in 100% analog preamp with a midrange presence and slight drive character
  • Hi-Z switch allows input impedance adjustment (50 kΩ ⇔ 1.1 MΩ)
  • Equipped with the classic MN3007 BBD chip; stereo output supported
  • Toggle switch to select Chorus or Vibrato mode, plus a dedicated effect on/off footswitch

Impressions from Actual Use (Sound Section)

● Chorus Mode

• You can freely achieve thick, warm ’70s-style modulation as well as clear, string-like ’80s-style tones.
• Engaging the preamp naturally brings the sound forward and thickens the mids, adding an expressive accent.
• It sounds great not only on electric piano tones but also on synth pads and synth brass.

● Vibrato Mode

• You get a rotary speaker-like swirl effect, and with slower settings, it creates a Leslie-style gentle wobble.

● Stereo Output Effect

• While the mono output is already full, the stereo output offers an even more spacious and lush sound field.
• Of course, it sounds amazing on vintage electric pianos, but it also works incredibly well on electric piano sounds that are found in all-in-one synthesizers. It adds a rich, warm vibe that elevates even digital presets.

Usability & Operation

• The WA-C1 features a generously sized enclosure, making knob and switch operations easy and intuitive.
• The built-in Hi-Z switch ensures compatibility not only with guitars but also with keyboards and passive instruments.
• An LED indicator provides visual feedback on the current mode and LFO speed, making it user-friendly even on dark stages.

How It Compares with Other Units

● Difference between the Boss CE-1 / CE-2-style clones

• WA-C1 offers independent control over Depth and Rate, allowing for a wider range of modulation from subtle shimmer to bold warble.
• The inclusion of Hi-Z input and the built-in preamp adds distinctive features that set it apart from the rest.

● Versus Boss CE-2W Waza Craft

• WA-C1 comes in at a more affordable price (about ¥5,000 less than the CE-2W) while offering its own set of advantages, such as Hi-Z support and dedicated control knobs, make it a compelling alternative.

Who Is It Recommended For?

• Keyboardists seeking that thick, vintage-style chorus/vibrato that’s reminiscent of the ’70s–’80s sound
• Those who want versatility, using it with stereo synths, electric pianos, or even stage pianos
• Players who enjoy fine-tuning their tone with detailed modulation control and tonal shaping

Videos

Using the Warm Audio WA-C1, we recorded videos this time with Rhodes and Prophet-5.

■ WA-C1 CHORUS VIBRATO+RHODES

■ WA-C1 CHORUS VIBRATO Prophet-5 Pad

■ WA-C1 CHORUS Prophet-5 Bass

Overall Evaluation & Summary

The Warm Audio WA-C1 is an excellent unit that aims to capture the classic analog chorus “texture” while adding modern extended features.
Despite its affordable price range, it delivers outstanding sonic depth and is perfect for playing with stereo output, Hi-Z, and the built-in preamp.

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